fix(init):tests passing for all node versions

README.md

@@ -1,3 +1,6 @@
+[![Build Status](https://travis-ci.org/kmontag/protobufjs-loader.svg?branch=master)](https://travis-ci.org/kmontag/protobufjs-loader)
+[![semantic-release](https://img.shields.io/badge/%20%20%F0%9F%93%A6%F0%9F%9A%80-semantic--release-e10079.svg)](https://github.com/semantic-release/semantic-release)
+
 # protobufjs-loader
 Webpack loader to translate
 [protobuf](https://github.com/google/protobuf/) definitions to
@@ -63,4 +66,4 @@ module.exports = {
  */
 const Root require('my/protobuf.proto');
 
-```
+```

package.json

@@ -24,17 +24,21 @@
     "chalk": "^1.1.3",
     "escodegen": "^1.9.0",
     "espree": "^3.5.1",
+    "estraverse": "^4.2.0",
+    "glob": "^7.1.2",
     "inspect-loader": "^1.0.0",
     "jsdoc": "^3.5.5",
     "loader-utils": "^1.1.0",
     "memory-fs": "^0.4.1",
     "minimist": "^1.2.0",
     "mocha": "^4.0.1",
     "schema-utils": "^0.4.2",
+    "semantic-release": "^8.2.0",
+    "semver": "^5.4.1",
     "tmp": "0.0.31",
+    "uglify-js": "^2.8.29",
     "uglify-loader": "^2.0.0",
-    "webpack": "^3.8.1",
-    "semantic-release": "^8.2.0"
+    "webpack": "^3.8.1"
   },
   "repository": {
     "type": "git",

test/helpers/compile.js

@@ -6,7 +6,8 @@ const webpack = require('webpack');
 
 const fixturePath = path.resolve(__dirname, '..', 'fixtures');
 
-module.exports = function (fixture, loaderOpts, webpackOpts = {}) {
+module.exports = function (fixture, loaderOpts, webpackOpts) {
+  webpackOpts = (webpackOpts || {});
   return new Promise(function(resolve, reject) {
     let inspect;
     const compiler = webpack(Object.assign({